EP1405505A1 - Color key preservation during sample rate conversion - Google Patents

Color key preservation during sample rate conversion

Info

Publication number
EP1405505A1
EP1405505A1 EP02738548A EP02738548A EP1405505A1 EP 1405505 A1 EP1405505 A1 EP 1405505A1 EP 02738548 A EP02738548 A EP 02738548A EP 02738548 A EP02738548 A EP 02738548A EP 1405505 A1 EP1405505 A1 EP 1405505A1
Authority
EP
European Patent Office
Prior art keywords
image
key
color
keyed
scaled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02738548A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jens A. Roever
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Entropic Communications LLC
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25405374&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1405505(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1405505A1 publication Critical patent/EP1405505A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • H04N9/75—Chroma key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
    • H04N5/275—Generation of keying signals

Definitions

  • Luminance keying operates similarly, wherein the brightness level of regions of an image define whether to insert a replacement image in each region.
  • each of the color-keyed image and the background image would be scaled to the desired output image scale before being merged, so that image resolution is not lost by constraining the resolution of the background image to match the resolution of the color-keyed image, or vice versa.
  • the edges of the non-color-keyed regions in the scaled image 131 will exhibit minimal distortion from a blending of the color-key color into the non-color-keyed regions.
  • the color-key value in the keyed image 101 is replaced in the key-extracted image 121.
  • the same memory space is used to store the keyed image 101 and the key-extracted image 121. That is, the color-key pixels in the keyed image 101 are replaced, and the non-color-key pixels are unchanged, thereby modifying the keyed image 101 to produce the key-extracted image 121, rather than creating the key- extracted image 121 as a separate image.
  • the value chosen to replace the color-key value is preferably the closest non-color-key value to the color-key pixel. Other replacement values may also be used.
  • each of the techniques employed to minimize the blending of pixel values at the edges of the non-color-key regions can be independently, and optionally, employed.
  • the thresholding step 150 can be eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Studio Circuits (AREA)
  • Editing Of Facsimile Originals (AREA)
EP02738548A 2001-06-29 2002-06-20 Color key preservation during sample rate conversion Withdrawn EP1405505A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/895,965 US6714257B2 (en) 2001-06-29 2001-06-29 Color key preservation during sample rate conversion
US895965 2001-06-29
PCT/IB2002/002532 WO2003003722A1 (en) 2001-06-29 2002-06-20 Color key preservation during sample rate conversion

Publications (1)

Publication Number Publication Date
EP1405505A1 true EP1405505A1 (en) 2004-04-07

Family

ID=25405374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738548A Withdrawn EP1405505A1 (en) 2001-06-29 2002-06-20 Color key preservation during sample rate conversion

Country Status (7)

Country Link
US (1) US6714257B2 (ja)
EP (1) EP1405505A1 (ja)
JP (1) JP4159984B2 (ja)
KR (1) KR100910528B1 (ja)
CN (1) CN1269349C (ja)
TW (1) TWI243343B (ja)
WO (1) WO2003003722A1 (ja)

Families Citing this family (12)

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US7391437B2 (en) 2002-12-18 2008-06-24 Marvell International Ltd. Image sensor interface
EP1549083A3 (en) * 2003-12-19 2007-10-24 Texas Instruments Incorporated Method and related system for overlaying a graphics object on a digital picture
US7145573B2 (en) 2003-12-19 2006-12-05 Texas Instruments Incorporated Method and system to combine a digital graphics object and a digital picture
US7670227B2 (en) * 2004-12-30 2010-03-02 Microsoft Corporation Changeable console face plate
US8072472B2 (en) * 2006-06-26 2011-12-06 Agfa Healthcare Inc. System and method for scaling overlay images
KR100708209B1 (ko) * 2006-08-24 2007-04-18 학교법인 대양학원 컬러 영상의 신축적 부호화, 복호화 방법 및 장치
US8798391B2 (en) * 2011-05-23 2014-08-05 Infosys Limited Method for pre-processing an image in facial recognition system
CN102752544B (zh) * 2011-11-21 2017-06-13 新奥特（北京）视频技术有限公司 一种利用色键进行图像校色选区的方法
TWI490851B (zh) * 2012-05-24 2015-07-01 Innocom Tech Shenzhen Co Ltd 顯示裝置及其控制方法
GB2532958B (en) * 2014-12-02 2021-09-29 Advanced Risc Mach Ltd Method of and apparatus for processing frames in a data processing system
US10949087B2 (en) * 2018-05-15 2021-03-16 Samsung Electronics Co., Ltd. Method for rapid reference object storage format for chroma subsampled images
CN112235520B (zh) * 2020-12-07 2021-05-04 腾讯科技（深圳）有限公司 一种图像处理方法、装置、电子设备及存储介质

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602286A (en) * 1982-01-15 1986-07-22 Quantel Limited Video processing for composite images
US4875097A (en) * 1986-10-24 1989-10-17 The Grass Valley Group, Inc. Perspective processing of a video signal
US5369443A (en) * 1991-04-12 1994-11-29 Abekas Video Systems, Inc. Digital video effects generator
US6173013B1 (en) * 1996-11-08 2001-01-09 Sony Corporation Method and apparatus for encoding enhancement and base layer image signals using a predicted image signal
JP3318707B2 (ja) 1996-11-08 2002-08-26 ソニー株式会社 画像信号符号化装置および画像信号符号化方法、画像信号復号装置および画像信号復号方法、画像信号伝送方法、並びに画像信号記録媒体
US5974172A (en) * 1997-02-14 1999-10-26 At&T Corp Method and apparatus for coding segmented regions which may be transparent in video sequences for content-based scalability
US6122014A (en) * 1998-09-17 2000-09-19 Motorola, Inc. Modified chroma keyed technique for simple shape coding for digital video
US6525741B1 (en) * 1999-08-30 2003-02-25 Xerox Corporation Chroma key of antialiased images

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03003722A1 *

Also Published As

Publication number Publication date
US20030001973A1 (en) 2003-01-02
KR20040014963A (ko) 2004-02-18
CN1520682A (zh) 2004-08-11
JP4159984B2 (ja) 2008-10-01
KR100910528B1 (ko) 2009-07-31
WO2003003722A1 (en) 2003-01-09
JP2004521578A (ja) 2004-07-15
CN1269349C (zh) 2006-08-09
TWI243343B (en) 2005-11-11
US6714257B2 (en) 2004-03-30

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